如何显示在图像视图图像

Question

我在Android定制的摄像头应用程序工作时，我点击图片库中看到它显示的是移动默认画廊和展示的照片，我点击，但我想，当我在画廊单击，然后单击图像展现在我的自定义查看我怎么能实现

public void clickedGallery(View view) { 
    if (MyDebug.LOG) 
     Log.d(TAG, "clickedGallery"); 
    //Intent intent = new Intent(Intent.ACTION_VIEW, MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
    Uri uri = null; 
    Media media = getLatestMedia(); 
    if (media != null) { 
     uri = media.uri; 
    } 

    if (uri != null) { 
     // check uri exists 
     if (MyDebug.LOG) 
      Log.d(TAG, "found most recent uri: " + uri); 
     try { 
      ContentResolver cr = getContentResolver(); 
      ParcelFileDescriptor pfd = cr.openFileDescriptor(uri, "r"); 
      if (pfd == null) { 
       if (MyDebug.LOG) 
        Log.d(TAG, "uri no longer exists (1): " + uri); 
       uri = null; 
      } 
      pfd.close(); 
     } catch (IOException e) { 
      if (MyDebug.LOG) 
       Log.d(TAG, "uri no longer exists (2): " + uri); 
      uri = null; 
     } 
    } 
    if (uri == null) { 
     uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; 
    } 
    if (!is_test) { 
     // don't do if testing, as unclear how to exit activity to finish test (for testGallery()) 
     if (MyDebug.LOG) 
      Log.d(TAG, "launch uri:" + uri); 
     final String REVIEW_ACTION = "com.android.camera.action.REVIEW"; 
     try { 
      // REVIEW_ACTION means we can view video files without autoplaying 
      Intent intent = new Intent(REVIEW_ACTION, uri); 
      this.startActivity(intent); 
     } catch (ActivityNotFoundException e) { 
      if (MyDebug.LOG) 
       Log.d(TAG, "REVIEW_ACTION intent didn't work, try ACTION_VIEW"); 
      Intent intent = new Intent(Intent.ACTION_VIEW, uri); 
      // from http://stackoverflow.com/questions/11073832/no-activity-found-to-handle-intent - needed to fix crash if no gallery app installed 
      //Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("blah")); // test 
      if (intent.resolveActivity(getPackageManager()) != null) { 
       this.startActivity(intent); 
      } else { 
       preview.showToast(null, R.string.no_gallery_app); 
      } 
     } 
    } 
} 

Answer 1

下面是完整的代码，你可以修改requestCode无论你在代码中声明了什么，你都可以在下一个活动中传递Uri或文件的实际位置。

@Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     if (resultCode != RESULT_CANCELED) { 
      if (requestCode == SELECT_FILE && (data != null)) { 
       Uri selectedImageUri = data.getData(); 
       String[] projection = {MediaStore.MediaColumns.DATA}; 
       Cursor cursor = getContentResolver().query(selectedImageUri, projection, null, null, 
         null); 
       assert cursor != null; 
       int column_index = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA); 
       cursor.moveToFirst(); 

       String selectedImagePath = cursor.getString(column_index); 
       if(selectedImagePath == null) { 
        selectedImagePath = getActualPathFromUri(selectedImageUri); 
       } 
       cursor.close(); 
      } else { 
       super.onActivityResult(requestCode, resultCode, data); 
      } 
     } 
    } 

    private String getActualPathFromUri(Uri selectedImageUri) { 
     Bitmap bitmap = null; 
     try { 
      bitmap = getBitmapFromUri(selectedImageUri); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
     if(bitmap == null) { 
      return null; 
     } 

     File imageFileFolder = new File(getCacheDir(),"appName"); 
     if(!imageFileFolder.exists()){ 
      imageFileFolder.mkdir(); 
     } 

     FileOutputStream out = null; 

     File imageFileName = new File(imageFileFolder, "appName-" + System.currentTimeMillis() + ".jpg"); 
     try { 
      out = new FileOutputStream(imageFileName); 
      bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out); 
      out.flush(); 
      out.close(); 
     } catch (IOException e) { 
      Log.i("Exception", e.getMessage()); 
     } finally { 
      if(out != null) { 
       try { 
        out.close(); 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 
      } 
     } 
     return imageFileName.getAbsolutePath(); 
    } 

    private Bitmap getBitmapFromUri(Uri uri) throws IOException { 
     ParcelFileDescriptor parcelFileDescriptor = 
       getContentResolver().openFileDescriptor(uri, "r"); 
     assert parcelFileDescriptor != null; 
     FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor(); 
     Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor); 
     parcelFileDescriptor.close(); 
     return image; 
    } 

Answer 2

当您从相机后背您拍摄照片或作品库后您的onActivityResult方法调用。因此重写你的onActivityResult像下面

protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     // TODO Auto-generated method stub 
     super.onActivityResult(requestCode, resultCode, data); 
     if (resultCode == RESULT_OK) { 
    //Read your image here and set in your imageView 
} 
    } 

编辑：

设置图像的图像视图

里面的onActivityResult

if(data.getData()==null){ 
    bitmap = (Bitmap)data.getExtras().get("data"); 
}else{ 
    bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), data.getData()); 
} 

yourImageView.setImageBitmap(img);